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DE69020773D1 - Method for correcting the driving force of a scanner. - Google Patents

Method for correcting the driving force of a scanner.

Info

Publication number
DE69020773D1
DE69020773D1 DE69020773T DE69020773T DE69020773D1 DE 69020773 D1 DE69020773 D1 DE 69020773D1 DE 69020773 T DE69020773 T DE 69020773T DE 69020773 T DE69020773 T DE 69020773T DE 69020773 D1 DE69020773 D1 DE 69020773D1
Authority
DE
Germany
Prior art keywords
scanner
correcting
driving force
driving
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69020773T
Other languages
German (de)
Other versions
DE69020773T2 (en
Inventor
Mitsuro Moriya
Masayuki Shibano
Hiroyuki Yamaguchi
Shinichi Yamada
Katsuya Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE69020773D1 publication Critical patent/DE69020773D1/en
Publication of DE69020773T2 publication Critical patent/DE69020773T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08529—Methods and circuits to control the velocity of the head as it traverses the tracks
    • G11B7/08535—Methods and circuits to control the velocity of the head as it traverses the tracks to maintain constant velocity during the traverse
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
DE69020773T 1989-04-07 1990-04-03 Method for correcting the driving force of a scanner. Expired - Lifetime DE69020773T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1088866A JPH02267781A (en) 1989-04-07 1989-04-07 Method for correcting load in retrieval controller

Publications (2)

Publication Number Publication Date
DE69020773D1 true DE69020773D1 (en) 1995-08-17
DE69020773T2 DE69020773T2 (en) 1996-03-14

Family

ID=13954932

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69020773T Expired - Lifetime DE69020773T2 (en) 1989-04-07 1990-04-03 Method for correcting the driving force of a scanner.

Country Status (4)

Country Link
US (1) US5048001A (en)
EP (1) EP0391677B1 (en)
JP (1) JPH02267781A (en)
DE (1) DE69020773T2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2731405B2 (en) * 1988-12-02 1998-03-25 株式会社リコー Optical axis deviation correction method in separation type optical pickup device
US5177725A (en) * 1989-07-18 1993-01-05 Asahi Kogaku Kogyo K.K. Servo apparatus with an expanded pull-in range
JPH07105122B2 (en) * 1990-05-08 1995-11-13 インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン Head position control method and apparatus
JPH0778890B2 (en) * 1990-10-03 1995-08-23 インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン Disk storage
JPH05174393A (en) * 1991-12-20 1993-07-13 Ricoh Co Ltd Method and device for access control of disk device
JPH05209263A (en) * 1992-01-13 1993-08-20 Nec Corp Manufacture of sputtered alloy film and apparatus therefor
JPH06215503A (en) * 1993-01-14 1994-08-05 Canon Inc Information recording and reproducing device
JPH09282816A (en) * 1996-04-05 1997-10-31 Sony Corp Motor controller, motor controlling method and optical disk drive
JP3484039B2 (en) * 1997-03-14 2004-01-06 株式会社東芝 Disk unit
CN1206634C (en) * 2001-03-28 2005-06-15 松下电器产业株式会社 Information disk device and method for detecting direction of installed information disk device
TWI220983B (en) * 2002-08-21 2004-09-11 Mediatek Inc Offset setting system for seeking control

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048055B2 (en) * 1977-12-29 1985-10-25 松下電器産業株式会社 search device
JPS5564661A (en) * 1978-11-08 1980-05-15 Toshiba Corp Self-compensator for magnetic disk memory unit
JPS56153562A (en) * 1980-04-26 1981-11-27 Matsushita Electric Ind Co Ltd Recorder and reproducer
JPS57147168A (en) * 1981-03-05 1982-09-10 Matsushita Electric Ind Co Ltd Jumping scanner
JPS6035377A (en) * 1983-08-03 1985-02-23 Olympus Optical Co Ltd Magnetic recording and reproducing device
JPS60239943A (en) * 1984-05-15 1985-11-28 Matsushita Electric Ind Co Ltd Optical head
JPS61170968A (en) * 1985-01-23 1986-08-01 Pioneer Electronic Corp Track access device
JPS62177773A (en) * 1986-01-31 1987-08-04 Mitsubishi Electric Corp Magnetic disk device
JPS63171431A (en) * 1987-01-07 1988-07-15 Mitsubishi Electric Corp Optical disk driver
DE3884824T2 (en) * 1987-02-04 1994-02-10 Matsushita Electric Ind Co Ltd Object positioning system.
JPS63275082A (en) * 1987-05-06 1988-11-11 Sony Corp Head positioning control system for disk drive
US4905109A (en) * 1987-12-23 1990-02-27 Konica Corporation Process for optimizing head position to overcome disk misclamping and imperfections
JPH02113436A (en) * 1988-10-21 1990-04-25 Ricoh Co Ltd Optical disk device

Also Published As

Publication number Publication date
DE69020773T2 (en) 1996-03-14
JPH02267781A (en) 1990-11-01
US5048001A (en) 1991-09-10
EP0391677B1 (en) 1995-07-12
EP0391677A1 (en) 1990-10-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8327 Change in the person/name/address of the patent owner

Owner name: PANASONIC CORP., KADOMA, OSAKA, JP